... cream霜剂 numbing agent麻醉剂 non mucosal非黏膜的 ...
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The insects release an anticoagulant to get blood flowing, and they also excrete a numbing agent so their bites don't often stir a victim's slumber.
这些昆虫会释放出一种抗凝血剂去维持血液的流动，同时也会分泌一种使人失去知觉的物质，所以他们的叮咬并不会影响受害者的睡眠。
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